I would check or replace the steam boiler temperature probe and listen to JRising

Well then, no need to talk about, 'out gassing'

Can the cam lever assembly be assembled in the wrong position?

Can wait to share your process and excitement and to hopefully view a video of it in action pulling a shot! Congrats!

Posting an image of the cap will help others visualize a solution the would be helpful for you

This is all most unfortunate. I would defer judgement till much later. This is a small boutique manufacture, they should be given the benefit of the doubt, the time and space to figure out the solution to their problem. It's in all our best interest that small operations such as this survive and thr...

Sounds like the bottom group valve for exhaust is not opening fully and functioning smoothly. This should be checked, verified and lubricated

Welcome to HB Rasmus I would suggest removing and cleaning the steam boiler water level probe. The likely cause of your problem is a defective steam boiler temperature probe. If you can, please post an image or video of the PID temperatures. It looks like you're direct plumbed based on the front pan...

Yes, the red circled device is the fill probe. I would try that first and see what happens

Step 1 - pull, photograph & clean steam boiler fill probe and take it from there